HYDROELASTIC ANALYSIS OF A CIRCULAR CYLINDER/LIFT ON BODIES OF REVOLUTION.

Abstract

Potential theory is applied to numerical solution of non-steady, separated flows about cylindrical bodies. The particular configurations studied are (1) an elastically supported circular cylinder in uniform onset flow and (2) a growing elliptical cylinder representing, in the cross flow plane, a slender body at angle of attack. Solution of non-steady, separated flows by potential theory is made possible by a generalization of the Kutta-Joukowski Condition to govern the rate of vorticity transport from the attached boundary layer into the near wake. This vorticity is represented by incremental, discrete particle vortices. Both theory and numerical results are presented. For the elastically supported circular cylinder, the natural frequency is taken to be the Strouhal frequency. Instantaneous pressure distributions, and force time histories are shown. For slender bodies at angle of attack, lift distributions, force and moment coefficients are presented for a body of revolution with length-diameter ratios of 10 at various angles of attack. Detailed separated flow stream lines are also shown. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1969
Accession Number
AD0708434

Entities

People

  • Ben H. Ujihara
  • Howard D. Mclaughlin

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Bodies
  • Bodies Of Revolution
  • Boundary Layer
  • Cross Flow
  • Cylindrical Bodies
  • Flow
  • Frequency
  • Geometric Forms
  • Geometry
  • Potential Theory
  • Pressure Distribution
  • Resonant Frequency
  • Revolutions
  • Slender Bodies

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerodynamics/Aeronautics.
  • Structural Dynamics.